名校
解题方法
1 . 动点
与定点
的距离和它到定直线
的距离的比是
,记动点M的轨迹为曲线C.
(1)求曲线C的方程;
(2)已知过点
的直线与曲线C相交于两点
,
,请问点P能否为线段
的中点,并说明理由.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45ff7e0ef1f622120cc1b18e9d3e80ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7ce176fdfbb44b8459f441a8d805013f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66f11c89c6066ef6d969cb33d0a76ea6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
(1)求曲线C的方程;
(2)已知过点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/84e4c652fd34eb7de9dbf84d92c6e640.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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2022-01-11更新
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7卷引用:江苏省南通市海安市实验中学2022-2023学年高二上学期1月月考数学试题